Penumbra is an episodic survival horror video game series developed by Frictional Games and published by Paradox Interactive and Lexicon Entertainment. The games use the HPL Engine 1, initially developed as a tech demo. Penumbra is notable for its horror styling and for allowing advanced physical interaction with the game environment. The Penumbra series is based on Frictional Games' earlier game "Penumbra Tech Demo", a short tech demo meant to demonstrate the capabilities of the company's HPL Engine 1. The developers admitted that they edited the original engine which was 2D to support 3D environments. More information...
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